import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Prabhat
 */
public class TestServlet extends HttpServlet {

    private int rqCount = 0;
    Random generator = new Random();

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        long timeBefore = new Date().getTime(); // in milliseconds

        rqCount++;
        String output = "";
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        String t = request.getParameter("timeout");
        int timeout = 5 * 1000; // 5 secs
        if (t != null) {
            timeout = new Integer(t).intValue();
        }

        try {
            try {
                int sleepTime = generator.nextInt(timeout * 2);
                output += "rq" + rqCount + " sleepTime=" + sleepTime;
                System.out.println("Start sleeping");
                Thread.sleep(sleepTime);
                long timeAfter = new Date().getTime(); // in milliseconds
                long diff = timeAfter - timeBefore;
                System.out.println("Done sleeping for " + diff/1000 + " seconds");
                output += " diff=" + diff/1000 + " seconds";
                System.out.println(output);
                out.println(output);
                out.flush();
            } catch (InterruptedException ex) {
                System.err.println("InterruptedException");
            }

        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
